Hey, the only difference that these two models have is of features. The mechanism is same and both are equipped with the same engine and delivers the same mileage and performance. You will be finding more features in the Highline model. Please find below the list of features that you are getting in Highline.

Automatic Climate Control

Rear A/C Vents

Multifunction Steering

Cruise Control

Glove Box Cooling

Voice Control

Alloy Wheels

Touch Screen

Anti-Lock Braking system with EBD

Keyless Entry

Rest, you can check the detailed comparison through here. Please select the specific variant from the drop down list.

All these three cars are very good. Vento has the best build quality among the three. Verna comes loaded with features and has a good ride quality. But, the Honda City is the best package in the lot. It is an amazing car and has a very good ride quality and has great features. To see the detailed comparison among these three cars, please visit the link below http://www.cardekho.com/compare/honda-city-and-hyundai-verna-and-volkswagen-vento.htm

All three cars that you have selected are good and have their own pros and cons. If you talk about design and styling Honda City scores the best as it has been updated recently and comes with dynamic designing features, on the other hand the Rapid and Vento has a more subtle design than the dynamic creases and lines. Honda City also leads, when it comes to interiors and features, the new interiors of City gives of a sense of roominess and its features like 7-inch multi touch display, sunroof etc make it more advanced and luxury than the competitors. However, when it comes to engine and performance, the Rapid and Vento shares a same 1.6-litre diesel engine, which is refined and frugal. On the other hand, City's 1.5-litre diesel engine churns out lesser power and it is not that refined. However, we will advise you to test ride all three cars and to check these in real world conditions.

You can compare all three cars here as well: http://www.cardekho.com/compare/honda-city-and-skoda-rapid-and-volkswagen-vento.htm